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Finding the Fourth Proportional to 64,911.20, 91,006.90 and 64,911.20

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Solution

The fourth proportional to 64,911.20, 91,006.90 and 64,911.20 is: 91,006.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,911.20 : 91,006.90 = 64,911.20 : x
  2. Step 2: Convert to fraction form
    64,911.20/91,006.90 = 64,911.20/x
  3. Step 3: Cross multiply
    64,911.20x = 91,006.90 × 64,911.20
  4. Step 4: Simplify right side
    64,911.20x = 5,907,367,087.28
  5. Step 5: Solve for x
    x = 5,907,367,087.28/64,911.20
  6. Step 6: Final answer
    x = 91,006.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.